VulnerabilityModified
CVE-2021-3472
An integer underflow can occur in xserver which can lead to a local privilege escalation.
HIGH 7.8EPSS 1.05%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.05%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
A flaw was found in xorg-x11-server in versions before 1.20.11. An integer underflow can occur in xserver which can lead to a local privilege escalation. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 1.05% probability · 62th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-191
- Affected
- x.org/x server · fedoraproject/fedora · debian/debian linux · redhat/enterprise linux
- Source
- secalert@redhat.com
References
- http://www.openwall.com/lists/oss-security/2021/04/13/1Mailing List, Patch, Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1944167Issue Tracking, Patch, Third Party Advisory
- https://gitlab.freedesktop.org/xorg/xserver/-/commit/7aaf54a1884f71dc363f0b884e57bcb67407a6cdPatch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/04/msg00013.htmlMailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MDF7TAJE7NPZPNVOXSD5HBIFLNPUOD2V/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MO6S5OPXUDYBSRSVWVLFLJ6AFERG4HNY/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/N63KL3T22HNFT4FJ7VMVF6U5Q4RFJIQF/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PEXPCLMVU25AUZTUXC4MYBGPKOAIM5TW/
- https://lists.x.org/archives/xorg-announce/2021-April/003080.htmlMailing List, Patch, Vendor Advisory
- https://lists.x.org/archives/xorg-announce/2021-April/003080.htmlMailing List, Patch, Vendor Advisory
- https://lists.x.org/archives/xorg-announce/2021-April/003080.htmlMailing List, Patch, Vendor Advisory
- https://lists.x.org/archives/xorg-announce/2021-April/003080.htmlMailing List, Patch, Vendor Advisory
- https://seclists.org/oss-sec/2021/q2/20Mailing List, Patch, Third Party Advisory
- https://security.gentoo.org/glsa/202104-02Third Party Advisory
- https://www.debian.org/security/2021/dsa-4893Third Party Advisory
- https://www.tenable.com/plugins/nessus/148701Third Party Advisory
- https://www.zerodayinitiative.com/advisories/ZDI-21-463/Third Party Advisory, VDB Entry
- http://www.openwall.com/lists/oss-security/2021/04/13/1Mailing List, Patch, Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1944167Issue Tracking, Patch, Third Party Advisory
- https://gitlab.freedesktop.org/xorg/xserver/-/commit/7aaf54a1884f71dc363f0b884e57bcb67407a6cdPatch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/04/msg00013.htmlMailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MDF7TAJE7NPZPNVOXSD5HBIFLNPUOD2V/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MO6S5OPXUDYBSRSVWVLFLJ6AFERG4HNY/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/N63KL3T22HNFT4FJ7VMVF6U5Q4RFJIQF/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PEXPCLMVU25AUZTUXC4MYBGPKOAIM5TW/
- https://lists.x.org/archives/xorg-announce/2021-April/003080.htmlMailing List, Patch, Vendor Advisory
- https://lists.x.org/archives/xorg-announce/2021-April/003080.htmlMailing List, Patch, Vendor Advisory
- https://lists.x.org/archives/xorg-announce/2021-April/003080.htmlMailing List, Patch, Vendor Advisory
- https://lists.x.org/archives/xorg-announce/2021-April/003080.htmlMailing List, Patch, Vendor Advisory
- https://seclists.org/oss-sec/2021/q2/20Mailing List, Patch, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.